Signal.



W. SPARKS.

SIGNAL.

APPLlcAlon rlLEn auna. |9175.

l Patented Feb.6,1917

w. SPARKS.

SIGNAL PPUCAUN lHill) OCT-9| 1915- v y 1,214,721.` Patented Feb. 6,1917.

3 SHEETS--SHEET `2.

a suina-suur a.

NVLNTOR- Patented Feb. 6, 1917.

, Tr-.. TV.. T1 C...

` W. SPARKS.

SIGNAL APPLscArloN FILED ocr. s. |915. 1,214,721.

I UNITEDH 4sTA'LEES OFFRE.

I W'LLIAM SPARKS, oF JACKSON', MICHIGAN, Asslaivon wenn?. snmwwmnmemox.

CQMPANY, F CLEVELAND, OHIO, A ,GOMQRATION pF-nHIQ.

.M il

'- T0 allwfwvfitmayconcern.'

l Be `itlgnown that I, Winnaar SPARKS, a citizen of the United Statesjof--"me'riea, :unly ife'siilent- .of Jackson, in the county "of 5{laelisoluiu the State oJoVIiehgau, havefinr" 4vented. flew/.fanduseful, linplgweinentsg Sigi'ials,= of' which the following, taken'incimne'ction with the accompanying drawings, ,a full, cle-ai', andcxai'ftdeseription.

1o 'lhis invention relates to certainv i|npovements in. signals of'th'cain actuated cli-af phi-aghi type. 'i v `The primary object of theinvention is to provide, in' Signale of this type, ancw auil linnn-overlmeans lfm externally adjust;-l

. il 1g...tln...1-el a ted-purtsi-ot'm the struetlnfe to -va-ry theextent 0:1"- `forced Yibl'ation. of thewdia.-

pln'agniam'l therefore the sound produced by the instrument". )therohjeetsan'd advantages will appear from the following descriptiontakenjn connection willi. vthe aeConqmnying drawgu'ieisjfa'sideelevation of the signihE i i dinvalvuf'ossl siectio'n'ofthe iifm"v of the invention.r

F4515 le a eifos Secton on Yline 55-5, Fig. i Il is alol'lgitndlnalcross section of l'iini on` li-iln l eleva tir m1,' fini i [imi finanolf' ."ctinn nl'. the compl en yn 1` ail ete signal. of Fig. H, 9

Specification at Leittersrlatent. ppliation fnd croer s, 1915. semina,54,737. L

1e elevationp-.irtly in `whenA the ho'rnis"ti'lteih"'whereby the cani'teeth upon'zif i'otoi' -416- mounted', "upon" the al'niat-nve -SlntftF"lOfwouldbe4 Fig;

illl'rstiation Substantially?, circular `and e045 Patented Fab. 6,1.91.7.

centric to a `perpendlnnla to the da phragm -l-lfpassing' through thewenrf nieve -7-\ pnrysltloned vtnrllj"v venti-ally nf the dlnplnagrwlndpreferably having an adjustablebeat-ing #-13-u furthe rear end of themotor theft.v

onring-rMl-l mounted thereon and adapb.

ed to substantially- 'contactfwith `the inner wallv of' tjllefluot'oi'easing -9--, .and` the adjustablebeai'ing- I3-#Resolves to hold the'nlotoi' i'nsueh" po'Sitionthat the .Wilheit as nisubstantial ContactWlth the `ease to.` .p1-event: rattling; of 'the armature shaft durlngoperation of 'the motor, and' to prevent' 'intervint-kedowith vthewen'npiece ufp'en' ticallfy in'ipossihleto nlountft'llewasher 1 r the Yust/.1

thrust-'beal'lnm used in .conjunction witliya washer @14;

l, not ailapte'il for, and lcannot' be used'vin, the completedstl'uetnye asji" aimezum` l"for varying vth ing the overlap vof teethupon `y20--,preferably of a construction similar to that shown in myvcfu-,pending application Serial N o. 861,220 filed September '11, 1914,

for electrically operated horns. y

In order tovary the forced vibration of 'the diaphragm and, therefore,the volume and character of sound produced by the signal, I utilize .arotor *16* in Which the .camteeth haveI their effective edge portions`disposed lit unan y gle to the diaphragm, and in combinationwith such acam I 'rovide Ineansffor movin the armature sha t laterally-of its axisw ereby the point of Contact oif ,the Wear-piece with the cam teeth isvaried radially of the rotor, 'thereby varythediaphragm. l

Various structures` may be utilized for to varyv the extent of forcedvibration of ,moving the amaturet-,S'haft -10- carrying the rotor,transversely lof its' longitudinal axis, and in Figsl, 2 .and- 3, I haveshown the front wall of. the'. motor case -9, as P IQyidedniith.fasi.projecting `flange f 21- prefera'bly extending, as shown, more thanhalf the circumference of the motor case. This 'flange is provided witha circular opening -22-A at one endand a series of slots .-23jsubstantially concentric with said opening, progressively increasing :inlength as'their distance -from the opening 22 increases. The motor caseis then secured to the ring -5-f by means of threaded i screw lor bolt A24-engaging the flange -21- and lying in the opening 22* and havin' athreaded engagement with an interior y threadedopening in the ring --Qmayfthen betightenedw to holdthe motor v "It willbef'readily apparentthat mentv of 'the motor case,-

Th'is screw *2l- Vforms a pivot on the ring about. which the motor caseas a whole', carrying the rotor --1'6-, moves. A suitable 'series'ofscrews or 'bolts 25 are-engaged with the slots --23-v and have Iltl'lebd relation with interiorly threaded- "opnings vinftbe 'ring -5*-.o j Airotaifily vinoved abont the axis 724g until the rdesired overlapofthe teeth 4 By loosening the screws +257-, thecinqtor lcasezmay.be

4-15- upon the wear-piece is attained., The screws case vigitsadjii's'tedposition 4 .the movey and the parts carried thereby,rotarilyabout the axis 1-24-,

' which axis 4is eccentric to the axis of the case,causes a movement ofthe case and armature vsh'attlaterally of. thelongitudinal axis ofsaidshaft, thereb the pointnf contact of t radially varying ejcaryfnteeth with, the wear'pieee #4-,and `that by varyingthe point yof contactthe degree of overlap 1 nlldgtlie fo'red vibrati n 'of the diaphragm y Iu of ,cns'tuctionlisfshown, in that 'the motor A,

arey ljikewisegvaried. y. l

InlFigs. lV 'and 5,'a slightly Avarle'd form,

case T9-is directly laterally;4 movable as the wear-piece a Whole,rather than rotarily movable to eii'ect a lateral movement,van' for thispurpose `the case is providedwith theliange "-21-, which may or may notbe continu' ons, such Hange being provided with a seriesot parallelextending slots -`-23- for the reception of thev screws or bolts .-25-having a threaded relation with the ring -5-. A By loosening the screws,the motor case and armature shaft carried thereby are directly movedlaterally of the axis ofthe shaft to radially vary'the point of contactof the cam teeth o f the'rotor with the Wearpiece. The screws" may betightened to hold the motor in any desired pos1tion.of'adjustment.

'In Figs. 6 and 7, another modilied form of the invention is shown, inwhich the ring av circular flange 26- adapted to fit over the exterior.of

the adjacent end Vof the motor case -9 andhaving Y circumferentiallyextending lslots' 27- for the reception of screws 28- lmving a motorcase Sl- -In this illustration, thel armature shaft -10-. is positionedeccentrically` oi the case the case '-9- within the ring -5-, which ringis rigid with the diaphragm, moves the .structure is shown,

the I threadedmengagement with the provided with the flange 26% andslots g7 gaged with theV motor case -9'-. In this illustration, however,the armature shaft is` for 'tliereception of screws ,28-- en'- conentricwith 'the main portionL-QQ-v of the motor case, and theend portion 30 ofsuch voase engaged with the flange #26,- has a portion of .itsexterior'surface ground away or is, in thev original operationV of'production, circularly shaped about an axis ec centric to the axis ofthe motor shaft which isv coincident with the axis of the main por,-tion -1294- of themotor case. It will be apl'mrent that rotation of themotor case 9'h with the ring-5- will= move- 'they shaft v-lO` laterallyof itsI` axis-'and radially vary the point of4 contact of the cam teethlwith the wear-piece, vdue-to the eccentricity ofthe motor shaft withrespect to the 'end portion ofthe ease,-which 'end portion engages `theflange 26- and de- 4termines the axis oflmovement of the case In Figs.1() and llgfa' further varied form l of the invention is shown, in'thatthe motor case 9W is of somewhat less diameter than the fiange 26m so'that the 'ease may bodily be' moved laterally withinthe flange toradially vary the point of contact of the cai'u teeth with thewear-Piece. By adjusting the screws -31-, whici have u threaded relation with the flange w26#- and which may either beur against theexterior of the motor Case or may have a threaded relation there with.,the motor oase may be moved Vin any desired direction ,relative to theflange 4267, whereby the motor shaft -10- is movedtransverso of itslongitudinal axis to radially vary the pointof contact of the cam teethwith the Wear-piece.

lli-,Figs 12 und 18, a modified form of the invention is shown In thisstructure the motorv ease is provided with 'a projecting boss in whichthe motor shaft -'10 is journaled and thr'ollgli==wl1ich said shaftextends. The boss ,--SZm is provided with laterally extending brackets-33 at its forward end, which brackets areprovidvd With, pintles E341mjournaled in ears *l-5.,# projecting-rearwardly from the ring -5-. TheWear-piece 7W is disposed substan^ tially dia-metrically of thediaphragm, and the axes of the pintles W34*- preferably lie in the sameAdimeter of the diaphragm. The rotor +16-, in' this instance, may beshaped as Shown to constituted combined wheel and facecam so that.therotzir'y movement of tlie'motor' about the vaxes of-thepintlesf-34-y, althongh varying the point of contact'of the Wear-piece'with the teeth of the vroto1',"will'not vary the degree of overy lap ofsaid parts', Athereby producing the l may jbeimitde to sameextent of'iforcedvibration of the diaphragm in any movement of the motor frjcr'nahorizontal to a vetricul posltin of thearmature-,shaft thereof. ItVvvi-ll be apparent,`ho`w 'ever, tha .teeth oftherotor may'iheshliped invarloiis rivny's to vary the degree of-overlal-ioE-the same upon thewearpiece as the motor is rotated on'the Vpintles *sjryery'anlvnnta--movemet of the n'liot'or 4frein vertical to'` horizontal position4vdoes-not aiect theexte'nt ofgjforced vibration ofptfheidii-'phra 'e'tothe feet-that 1t n1 available spaeewhen penminentiy vassembled andvVVpositioned -for use; as upon' a motor vehicle. SAlidffor thepurpose-ot holding thel motor in y xi'n'y' desired position relative to.the '(liaphragm, the rin'p: ;-fi-f provided with ay semi-'circulan realwardly lrojecting` bracket having a .i slot BT-,concentriciillydisposed; with respoot` to' the 'xis ,of lnovelnentof the motor`Jus'tmentofvtlie boss, and aisuiftniile setscrew- --38- extends throughthe slot und has a he setserew may be loosened and the motor moved toany de- Fig. ,1d illustrates a cam in which tliecurve or angle of theteeth is such that they approach nearer thel diaphragm as they extend,preferably radially, outward from the axis of rotation, being a reversalof the Cain shown in the other figures, in which the an1 guiar or curveddisposition of the cam teeth causes their effective actuating portionsVto lie farther from the diaphragm as they eX- tend outwardly from theradius of movement. Vith the cam of Fig. 1l, a reversal of the eifert ofthe adjustment of the Cain of the vother figures would be attained.

Although I have shown and described several particular constructions andmethods of operation as adapted for accomplishing the end in View, I donot desire to limit myself to any particular construction or method ofoperation, as many changes may he made in the details 'of constructionand method of operation without departing from the spirit of thisinvention as set forth *inj the appended claims, the Vbasic featurel ofwhich resides in varying the overlap of the cam teetltupon'the diaphragmwearpieceI by a. movement ofthemezns carrying said teeth transverse ofits axis ofrotation.

lVhat I claim is l 1. ln asignal, a diaphragm ha'vinga Wear piece, a.motor including a case and hsving its arma-ture shaft presented endwistou-iard the diaphragmf-a rotorhaving, teeth` and means for' varying'the overlapof said teeth upon the wear-piece by movement of said raseina. plane*substantially parallel with, tliediaphragin. i ,i v

2. in a signal, afdiaphragm havingr a'wve'ar piece, a motor including arase angl-having its armature sha-ft presented eudiijise ard. thediaphragm, a rotor haviugteet and means forvarying the overlap of saidteeth upon v,the wearfpiece by a movement offs'aid casein a! planeperpendicular tothe axis 'of rotation of 4said rotor. i

3.- n a signal, a diaphragm having, a wearpiecc associated therewith, adriving. shaft presented endwise toward the dinphragm, a rotor on saidshaft and means for varying the overlap of said. rotor upon saidwear-piece b v` movement ofisaid rotor in a plane `per-pendioular to itsaxis of rotation.

4i In aV signal, a diaphragm havingV au:

phrngm, a rotor on said shaft, and means for varying the overlap of saidrotor upon said Wear-piece 'by intjiveinent of said rotor ina-.direction substantially parallel with the diaphragm.

5. In a signal, o. diaphragm having -a wear-'piece associated therewith,a driving shaft presented endwise towardI the diaphragn'i, a crown camon said shaft and having its teeth anffularly disposed with respect tothe'plane of the diaphragm, and-means allowing movement of said camsolely in u direction transverse its axis of rotation to vary the degreeof overlap of said cam upon said wear-piece. v

G. In a signal, a diaphragi'n having wear-piece -associated therewith, acrown cam adapted to rotate on an axis substantially perpendicular tothe diaphragm having its teeth an ularly disposed with respect totheplane o the diaphragm, and means allowing movement of said cam in adirection substantially parallel with the diaphragm to vary the degreeof overlap of said. cam upon said uf'earpiece.

7. In a signai, a diaphragm having a wear-piece associated therewith, arotary crown cam. having its axis of rotation substantiall/yperpendicular to the diaphragm and means permitting movement of therotor solei),r in a direction transverse of its axis of rotation to varyits overlap upon the wear-piece.

`S. In a signal, af diaphragm having a wear-piece associated therewith,a driving shaft 'presented endwise toward lthe diaphragm, a. rotor onsaid shaft, means' permitting movement of the rotor in a directionsubstantially parallel with the diaphragm to 'varyits overlap uponsaidweer-piece.

S: In a' signal, a diaphragm having a wear-piece associa-ted therewith,a rotor,-

ni ses permitting movement of the rotor shout an. substantiallyperpendicular 'to the iliaphig-agin and nt one side of the axis oit''rotation of said'4 rotor, said movement varying the degree of overlapof said rotor onV said Wear-piece.

1U, In a signal, a diaphragm having weanpiece associated therewith, .a-.-rotor, means permitting movement of. the rotor about anxaxissubstantially perpendicular to .the dialihragm at Jalipointto oneside:ofthe 'weai'piece and eccentric tothe "xisofrotation of said rotor, saidmovement varying the degree of overlap 'of said' rotor on saidwear-piece. l t 11. In a signal, a diaphragm having a- -wear-pieceassociated therewith, a 'motor having vits armature shaft presentedendwise'toward the diaphragm, a; cam mounted upon said armature shaft,and means allow* 'ing movement of -said motorl transverse the `axis ofrotation of lts armature sheft andV about anexis perpendicular to thediaphragm Gli nt a point to one side of the v vear piece.

12. In' a signal, a diaphragm having a wear-piece associated therewlth,a rotary crown cam having substantially radially disposed teeth, andmeans allowing movement of the lcam laterally of its axis to'vary,radially of the cam, the contalcting point of .said Wear-piece on saidteeth.

13. In a cam actuated diaphragm signal,

a diaphragm having an impact surface and a,

dicular to the diaphragm at a point to one `side of the impact surfaceto vary the degree of overlap of said cam teeth upon said impactsurface.

1.4.. Iny a. cam-actuated diaphragm signal,

a diaphragm having a wear-piece associated therewith, and a rotorrotating in a plane substantially parallel with the diaphragm and havingcam teeth obliquely disposed with respect to the effective contactsurface of said wear-pieceand means allowing move- 9 0 ment of saidrotor across its axis of rotation to vary the degree of overlap of saidcam teeth upon sald wear-piece. i

15. Ina cam-actuateddiaphragm signal,

a diaphragm having a wear-piece associated therewith,v a rotor havingcam teeth obliquely disposed with respect to the 'axis of rotation and`in plane parallel to the diaphragm of said rotor, Aand meanspermittingmovement of therotor transverse its axis of rotation to vary its overlapupon said wearpiece. l y

16.` In a cam-actuated dlephragml slgnal, a diaphragm having awear-piece associated therewith, a. driving shaft presented endwisetoward the diaphragm, a rotor mounted on said shaftand having cam teethobliquely disposed with respect to the effective contact surface of saidWear-piece, said com having a bodily movement radially ofthe Wear piece`to vary the point of contact ofthe wear'pie'ce on said cam teeth, andmeans permitting movement of the rotor transverse itsl axis ofrotationandabout an a-xis passing through the diaphragm et one side ofthe lweer piece to vary its overlap upon said wear-piece.

17. Ina cam-actuated diaphragm signal,

a diaphragmhaving a Wear-piece associated therewith, a Adriving shaftpresented end- 12o wise toward the diaphragm, a rotoi` mounted on saidshaftand having cam teeth obliquely disposed with respect to theeffective Acontact surface zof sind wearfpiece, and means permittingmovement of the rotor trans- 125 verse'said effective contact surfacetovary its overlap upon said surface.

18.. In a signal, a diaphragm havingawearsented emhvie toward the dnphmn pince nsmiutcd 'theriawith .a rotor having 4cam wutlloblquely disposdwith respect to`4 v the nxs of rumton of sal-id rotor, n' rotaryelectric matar lulving its armntnr'lmft prei l'l( upon which g'hnft saidrotor is moun y und means permlttmg movement of said mptor u bout anaxis ewentric 'to the axis of rutatlon of the armature shaft 'undpassing thlmlgh tllc (liflplllngm at H. point eccentric 1Q

